Industry Day 2025-01-28 Resid IDIQ.pdf
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About this file
This is an Industry Day presentation from the EPA regarding the Iron King Mine/Humboldt Smelter Superfund Site in Dewey-Humboldt, Arizona. The presentation outlines details for an Environmental Services IDIQ contract opportunity to remediate a former mining and smelting operation that operated from 1910-1970 (mine) and 1880s-1960s (smelter).
The cleanup scope involves two main components: 1) Residential remediation requiring sampling of 1,000 quarter-acre exposure units, with several hundred potentially needing cleanup through contaminated soil removal, disposal at the mine tailings pile, and property restoration, and 2) Waste area remediation involving consolidation of mine tailings, slag, and other contaminated materials into repositories. The procurement will be split into three IDIQs: Environmental Remediation ($5M-$100M, award Q1 FY26), Remedial Design ($5M-$49M, award Q2 FY26), and Remedial Action Construction ($5M-$249M, award Q2 FY27). The Industry Day is scheduled for January 28, 2025 at Gateway Community College in Phoenix, with separate sessions for remedial design (morning) and construction (afternoon). The Army Corps of Engineers Los Angeles District is managing the procurement, with EPA Region IX as the customer.
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Text version
Jeff Dhont, Remedial Project Manager U.S. EPA Region IX
Iron King Mine / Humboldt Smelter Superfund Site Industry Day Environmental Services IDIQ
January 28, 2025
Flagstaff
Phoenix
Tucson
Prescott
ARIZONA
Site Location: Dewey-Humboldt, Arizona
Prescott
Dewey-Humboldt
Operational History
Former Iron King Mine Property
Former Humboldt Smelter Property
Chaparral Gulch
Humboldt Town Proper
Agua Fria River
Iron King Mine:
Operated 1910 -1970 Zinc, Copper, Lead, Gold, Silver Biggest Production 1940s-1950s
Humboldt Smelter
– Making Pure Metals from Ore
Smelting Copper and Lead 2 Predecessor Smelters 1880s - 1904 Main facilities 1905-1937 Biggest Production 1914-1918 Other Operations 1940s, 1950s, 1960s
Val Verde Predecessor Smelter Destroyed by Fire 1904
Non-residential / Waste Areas
Residential Areas
Open Land North of Pile
Open Land South of Pile
Lower Gulch
Small Tailings Deposits
Small Slag Pile
South Smelter Plateau
Upper Gulch
Mine Tailings Pile
Waste Rock
Smelter Tailings Depression
Tailings Floodplain
Slag Wall
Dam
Middle Gulch
Mine Drainage Pathway
Dross Waste and Former Smelter
Operations
Non-Residential / Waste Bearing Areas
Selected Remedy
Waste Areas: Consolidation in Repositories
Residential Areas: Remove and replace surface soils
Residential Properties Remedial Action
Residential Remedial Action
Current sampling of 1000 exposure units of ¼ acre size
Remedial action may be necessary at several hundred exposure units
Task orders will include groups of exposure units identified for cleanup
Residential Cleanup
Resident signs Technical Excavation and Restoration Plan (TERP) (EPA)
Excavation of contaminated soils
Excavation area adjusted/expanded until EPC is below cleanup levels
Disposal of excavated soils at mine tailings pile
Backfill and compaction with clean fill
Restoration of property according to the TERP
Jeff Dhont, Remedial Project Manager U.S. EPA Region IX
Iron King Mine / Humboldt Smelter Superfund Site Industry Day
January 28, 2025
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